The deoxygenated blood from the hind limbs of frog is finally grained into
Given below is a highly schematic diagram of the human blood circulatory system. (a) Which part (state the number) represents the hearts? Give reason ink support of your answer. (b) Which numbers represent the following respectively? Aorta Renal vein Hepatic portal vein Stomach Pulmonary artery Dorsal aorta Superior vena cava